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| image = Gaudryceratidae - Kossmatella agassizianum.JPG | image_caption = Fossil shells of ''Kossmatella agassizianum'' from Maritime Alps, on display at Galerie de paléontologie et d'anatomie comparée in Paris |regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |subordo = Lytoceratina |familia = Gaudryceratidae | genus = ''Kossmatella'' |genus_authority = Jacob 1907 |synonyms = * ''Kosmatella'' Cossmann, 1909 |subdivision_ranks = Species |subdivision = * ''Kossmatella cappsi'' Imlay 1960 * ''Kossmatella agassizianum'' Pictet and Roux 1847 }} ''Kossmatella'' is an extinct genus of ammonoid cephalopods belonging to the family Lytoceratidae. These fast-moving nektonic carnivores 〔 lived in the Cretaceous period, from Albian age to Cenomanian age. ==Description== Shells of ''Eulytoceras'' species are quite small, with rounded whorl section and deep constrictions on the external surface. 〔(Lithotheque )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Kossmatella」の詳細全文を読む スポンサード リンク
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